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Expansion tank Pipe size...Q"Q ?

Jeff Elston
Jeff Elston Member Posts: 289
I got some newly installed systems all with same issue,  Being the reliefs all seem to weep, but not at the 30lbs.

Some of the techs think the expansion tank line size is to small.  These are new installed Knight boilers not very large not to small.  The tanks are sized properly that's been checked.  The line connecting them to the spirovent is 1/2 copper. 

Anyway pls comment on the expansion tank line sizing. 

Thanks Guys I been lurking for a while now.  Haven't posted in a couple years.
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